Reversing-gear.



PATENTED DEC. l5, 1908.

C. FELSING, JR. REVERSING GEAR.

APPLIUATION FILED APR. 3.

No MobEL.

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UNITED TATES Patented December 15, 1903.

ooNRAD EELsgINc., JR., oE KPENICK, NEAR BERLIN, GERMANY.

REVESING=GEAH.

SPECIFICATION forming part of Letters Patent No. 747,056, dated December15, 190'3.

I Application led April 3| 1903. Serial No. 150.933.l (No model.)

To owl whom t may concern:

Be it known that I, CONRAD FELSING, Jr., a Subject of the King ofPrussia, Emperor of Germany, residing at Kpenick, near Berlin, in theKingdom of Prussia, German Empire, have invented certain new and usefulImprovements in Reversing-Gears, of which the following is aspecification.

My invention relates to improvements in reversing-gears or mechanismsadapted for automatically reversing the movement of certain parts,accomplishing,r a reciprocating motion. This mechanism comprises a Hatrail carrying a throw-out, said flat rail being shifted a certaindistance by a finger carried by the part subjected to the reciprocatingmotion. Further, said mechanism is composed of a fulcrumed locking-leverprovided with notches, in which latter engage catches fixed to said fiatrail, the throw-out being retained-in its position by means 0f springs.Owing to this disposition, when the hat rail is displaced in alongitudinal direction the springs acting on the throw-out are lirst eX-panded by the action of the one'of the named catches and of saidlocking-lever. after the vone catch is disengaged from the locking-leverthrough the influence of the other catch and the latter has rotated thelocking-lever about its fulcrum the throwout is pulled along by means ofsaid springs.

In the accompanying drawings, forming a part of this specification, andin which similar numerals of reference indicate similar parts throughoutthe several views, Figure 1 is a plan, Fi, 2 a front elevation, of amachine provided with the new mechanism. On the upper part of thepedestals 1 the iiat rail 2 is supported by the bearings 3, which flatrail may of course be connected to any other suitable part of themachine. The 4hat rail 2 is provided with the two blocks 4 and 5,against which the finger at the front of the reciprocating carriage 6abut-s, so that said fiat rail 2 at the one or the other end of thetravel of said carriage 6 is moved alonga certain distance with thelatter. Further, the

The back of the throw- Further,

out 9 is provided on each side with a clutch, the teeth of the oneclutch lying opposite with regard to the teeth of the other clutch, saidteeth meshing with the corresponding teeth of the clutches provided onthe side of the bevel-Wheels A and B, respectively, and saidbevel-wheels A and B, by means of an intermediate bevel-wheel, beingadapted to drive in the one direction or in the other the screw-threadedshaft of the machine, along which the carriage 6 has to accomplish its1ongitudinal reciprocating motion. The throwout 9 is also provided withthe arms 10 and l1, receiving the one end of each of the springs orcoils 12, the other ends of which are connected to the cross-bars 7 and8. In order to steady this part of the mechanism, the springs or coils12 are guided by means of the cylindrical rods 13. The arm 11 and' thecross-bar 8 are provided with the catches 14 and 15, respectively, thecatch 14 of the arm 11 being adapted to engage with the notch 16 of thelocking-lever `18, while the catch 15, formed at the lower part of thecross-bar 8, is adapted to engage with the notch 17 of saidlocking-lever 18. The latter is fulcrumed or pivoted to the one of thepedestals 1 of the machine and is subjected to the action of a spiralspring or coil 19. The notch 16 of the locking-lever 18 has arectangular shape corresponding to the form ofthe catch 14, while thenotch 17 of said locking-lever 18 has an oblong form and is provided oneach side with a chamfering, so that when the catch 15 of the cross-bar8 during its longitudinal movement reaches the one or the other lateralchamfering of the notch 17 and slides along the same the locking-lever18 is turned around its fulcrum in the direction ofthe arrow 20.Consequently the catch 14, which either engages with the notch 1G orrests against the lateral surface 23 of the locking-lever 18 and whichexpands the springs cr coils l2 on the one or the other side during thelongitudinal displacement of the Iiat rail 2, is released, and thethrow-out 9 is pulled in the opposite direction, so that the bevel-wheelB is thrown in gear, and the carriage 6 is moved in a direction oppositeto the preceding one after the bevel-wheel A has been thrown out ofgear. The contrary action takes place when the flat rail 2 is moved inthe opposite direction. Of course the bevel- ICO fr) C Vel gear, inwhich the bevel-wheels A and B are alternatively thrown in and out ofgear, can be replaced by any other suitable arrangement-for example, bypulleys working together in a convenient manner.

The mode of operation of the new mechanism is the following: As thecarriage 6 moves, with its finger, in the direction of the arrow 21 saidfinger at the end of the travel of the carriage 6 strikes against theblock 5 of the at rail 2, whereby the latter is shifted in the directionof the arrow 22. At the same time the catch 14 of the throw-out 9 abutsagainst the lateral surface 23 of the locking-lever 18, so that thesprings or coils 12, fixed to the cross-bar 8, are expanded, and thethrow-out 9 remains in engagement with the bevel-wheel A until thecross-bar 8 reaches the right lateral chamfering of the notch 17 of thelockinglever 18. Consequently the latter turns about its fulcrum in thedirection of the arrow 20,and the throw-out 9 is released, whereafterthe latter is moved in the direction of the arrow 24- that is, of thebevel-wheel B. Now the latter is thrown in gear, so that the reversingof the motion of the carriage 6 is due to the fact that the threadedshaft of the machine turns in the opposite direction. On account of thisreversal of motion the locking-lever 18, by means of the spiral springor coil 19, returns in its normal position and the catch 14 engages withthe notch 16 of the lockinglever 18. If now during the return motion thefinger of the carriage 6 strikes against the block 4 of the flat rail 2and shifts the latter along, a tension or expansion ofthe springs orcoils 12, Xed to the cross-bar 7, takes place, because the catch 14 isin engagement with the notch 16 of the lockinglever 18. Further, thecatch 15, which is in engagement with the notch 17, acts on the leftchamfering of said notch 17 of the locking-lever 18, so that the latteris pressed down and turns about its fnlcrum. Consequently the throw-out9, through the action of the springs or coils 12, fixed to the cross-bar7, is pulled to the left, so that the bevel-wheel A is thrown in gear.The above-described cycle of operations is periodically repeated duringthe further motion of the machine.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. In a reversing-gear, the combination with a threaded shaft, of a partadapted to reciprocate on said threaded shaft, a flat rail adapted to bedisplaced by said reciprocating parta certain distance in a longitudinaldirection, a spring-actuated throw-out adapted to be moved along by saidflat rail, said throwout being provided with alateral catch,meansvcoperating with the throw-outforcontrolling the threaded shaft alongwhich the reciprocating part moves, and a fulcrumed lockingleverprovided with a notch adapted to receive the lateral catch of saidthrow-out.

2. In a reversing-gear, the combination with a threaded shaft, of a partadapted to reciprocate on said threaded shaft, a at rail adapted to bedisplaced by said reciprocatingv part a certain distance in alongitudinal direction, a spring-actuated throw-out adapted to be movedalong by said flat rail, said throwout being provided with a lateralcatch, two oppositely-lying clutches disposed on both sides of the endof the throw-out, two bevelwheels, each provided on its-inner side witha clutch adapted to engage with the corresponding clutch at the end ofthe throw-out, an intermediate bevel-wheel meshing with said twobevel-wheels, said three bevel-wheels controlling the threaded shaftalong which the part mounted thereon reciprocates, and a fulcrumedlocking-lever provided with a notch adapted to receive the lateral catchof said throw-out. V

3. In a reversing-gear, the combination with a threaded shaft, of a partadapted to reciprocate on said threaded shaft, a finger carried by saidreciprocating part, a flat rail 2 adapted to be displaced a certaindistance in a longitudinal direction, the blocks 4 and 5 supported bysaid fiat rail 2 and adapted to be shifted along together with the rail2 by said nger, the cross-bars 7 and 8 xed to the flat rail 2, the onecross-bar8being provided with a catch 15, the throw-out 9 slidablymounted on said dat rail 2 between said crossbarsl 7, 8 and providedwith the catch 14, means cooperating with the throw-out 9 forcontrolling the threaded shaft on which the part carrying said finger ismounted, the spiral springs or coils 12 disposed between the throw-out 9and the cross-bars 7, 8, and the spring-actuated fulcrumed locking-lever18, the latter being provided withva rectangular notch 16 adapted toreceive the catch 14 of the throw-out9 and with an oblong notch 17provided with a chamfering on each side, said notch 17 being adapted toreceive the catch 15 of the cross-bar 8, substantially as set forth.

4. In a y'reversing-gear, the combination with a threaded shaft, of acarriage 6 adapted to reciprocate on said threaded shaft, a finger atthe front of said carriage 6, a Hat rail 2 adapted to be displaced acertain distance in a longitudinal direction, the blocks 4 and 5supported by said flat rail 2 and adapted to be shifted along togetherwith the rail by said finger, the cross -bars 7 and 8 fixed to the atrail 2, the one cross-bar8 being pro vided with a catch 15, thethrow-out 9 slidably mounted on said flat rail 2 between said cross-bars7, 8 and provided with the catch 14, the two oppositely -lying clutchesvdisposed on both sides of the back of the throwout 9, the bevel-wheels Aand B both provided on their inner side with a clutch adapted to engagewith the corresponding clutch at the backof the threw-out 9, anintermediate bevel-wheel meshing with the bevelwheels A and B, saidbevel-wheels controlling the threaded shaft on which the carriage IOOIIO

6 is mounted, J[he spiral springs or coils 12 17 being adapted toreceive the catch 15 of disposed between the throw-out 9 and the l thecross-bar 8, substantially as set forth. cross-bars 7, 8, the rods 13adapted to guide In Witness whereof I have hereunto signed the springsor coils 12, the fulcrurned lockmyname this 19th day of March, 1903, inthe 5 ing-lever 18, and the spiral spring.; or coil 19 presence of twosubscribing Witnesses.

acting on said locking-lever 18, the latter being provided With arectangular' notch 16 CONRAD FELSING JUN adapted to receive the catch 14of the throw- Witnesses: out 9 and with an oblong notch 17 providedAUGUST HIRSCH, zo with a, chamfering on each side, Said notch OTTONEUMANN.

